/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.metadata.mtree.store.disk.memcontrol;

import org.apache.iotdb.db.metadata.mnode.IMNode;

import java.util.List;

public interface IMemManager {

  void init();

  boolean isEmpty();

  boolean isExceedReleaseThreshold();

  boolean isExceedFlushThreshold();

  void requestPinnedMemResource(IMNode node);

  void upgradeMemResource(IMNode node);

  void releasePinnedMemResource(IMNode node);

  void releaseMemResource(IMNode node);

  void releaseMemResource(List<IMNode> evictedNodes);

  void updatePinnedSize(int deltaSize);

  void clear();

  long getPinnedSize();

  long getCachedSize();
}
